These 36 brightly colored science teaching visuals (labeled on front and unlabeled on the back) come in one handy book. They correlate with grades 4-6 Homeschool Science/Health Curriculum/Lesson Plans. The unlabeled side is great for reviews. The perforated pages make it easy to remove individual pages to display on the wall. The 8½" x 11" size allows detached charts to be easily stored in page protectors.